HOW TO HIT THE SLICE SERVE. In this video, former ATP top 100 player, Jeff Salzenstein, teaches you how to hit an effective slice serve. Whether using the slice as a first or second serve, you need to master the fundamentals of this serve to use it with consistent results. Learn the best grip to use, where to position the toss and how to finish your body rotation to maximize the spin and slicing action of your serve. Watch this video to add this all-important weapon to your serving arsenal.